KR20040024461A - Valve apparatus - Google Patents

Abstract

PURPOSE: A valve device is provided to obtain high surface precision, to prevent a valve element from being warped by forming a first plate member at a thickness enduring the temperature of brazing an outlet pipe, and to cut down the manufacturing cost. CONSTITUTION: A valve device is composed of a valve seat plate(13) drilled through with an inlet(13c) and outlets(13a,13b) of fluid in the thickness direction; a sealing case for covering a front surface of the valve seat plate; an inlet pipe(28c) and outlet pipes(28a,28b) fixed on a back surface of the valve seat plate to communicate respectively with the inlet and the outlets; and a valve element for sliding on the area of the outlet on the front surface of the valve seat plate to open and close the outlet. The valve seat plate has a first plate member(11) for forming the area of the outlet and a second plate member(12) to which the first plate member is joined.

Description

Valve device {VALVE APPARATUS}

The present invention relates to a valve device having a configuration in which a valve body slides on a surface side of a valve seat plate in which a fluid inlet port and a fluid outlet port penetrate in a thickness direction. More specifically, the structure of the valve seat plate used for this valve apparatus is related.

The valve device for distributing a common refrigerant (fluid) in the refrigerator for cooling in the inside of the refrigerator by cooling the inside of the refrigerator, as shown in Fig. 6 (a) and (b), has a refrigerant inlet (13c) and a refrigerant outlet (13a). A valve seat plate 13 'through which 13b penetrates in the thickness direction, a sealed case (not shown) covering the surface side of the surface side and the inner side of the valve seat plate 13', and the valve seat plate. The one which has a valve body (not shown) which slides the surface of 13 'and opens and closes the outlet ports 13a and 13b is used. The rotor shaft 18 and the valve body shaft 35 are fixed to the valve seat plate 13 '.

In the valve seat plate 13 ', the inlet port 13c and the outlet port 13a and 13b are formed as a hole having a small diameter on the surface side and a large diameter end on the inner surface side, and the inlet 13c and the outlet port 13a ( The large diameter part on the inner side of 13b) is a pipe insertion hole, and is soldered in the state which the front-end | tip of the inflow pipe 28c and the outflow pipe 28a, 28b touches an edge part, respectively.

In the valve device configured as described above, the area where the outlets 13a and 13b are formed on the surface of the valve seat plate 13 'is a sliding surface of the valve body, so high surface precision is required to completely block the refrigerant. In addition, the valve seat plate 13 'is required to be thick so that twisting does not occur on the sliding surface of the valve body even when the pipes 28a and 28b are heated to a temperature of, for example, 1000 ° C or higher when the pipes 28a and 28b are fixed by soldering. In addition, the valve seat plate 13 'is required to be an iron-based material to be solderable, and SUS is used in terms of corrosion resistance.

For this reason, conventionally, when manufacturing the valve seat plate 13 ', it is necessary to perform cutting (race processing) on thick SUS, which causes a problem of high cost of the valve seat plate 13'.

Therefore, a method of manufacturing a valve seat plate by cutting into a cutting process can be considered, but forging is not a cutting process but a costly processing method. In addition, it is difficult to obtain high dimensional accuracy and high precision in the position of holes in forging. In addition, in the case of forging, there is a problem in that the surface where high precision is required due to the heat is twisted due to the high residual stress.

In addition, a method of manufacturing a valve seat plate by sintering by converting to cutting may be considered, but sintering is also a costly process, although not as much as cutting. In addition, in the case of sintered body, the hole sealing process is required, but in the resin impregnation, which is a general hole sealing process, the resin cannot withstand the temperature during soldering. Moreover, since a sintered compact has low surface hardness, there exists a problem that resistance to sliding of a valve body is low. In addition, since the lower limit of the hole diameter that can be formed in sintering is limited, for example, there is a problem that cutting is to be performed as secondary processing to form a hole of 1.5 Φ.

An object of the present invention to solve the above problems is to provide a valve device that can be attached to the pipe without generating a twist to the portion in which the valve body is sliding, and also can reduce the valve seat plate.

1 is a longitudinal sectional view of a refrigerant distribution device for a refrigerator to which the present invention is applied;

2A, 2B, and 2C are a plan view, a longitudinal sectional view, and a bottom view of the valve seat plate of the valve device used in the refrigerant distribution device shown in FIG. 1, respectively.

3 (a) to 3 (f) are explanatory diagrams of the respective modes in the refrigerant distribution device shown in FIG.

4 is a longitudinal cross-sectional view showing the valve seat plate shown in FIG. 2 in an exploded manner;

FIG. 5 shows the change in the planar size of the first plate member before and after the thickness dimension of the first plate member and the outflow pipe are pressed into the pipe insertion hole and soldered in the refrigerant distribution device shown in FIG. Graph to show.

Figure 6 (a) (b) is a longitudinal sectional view and a bottom view of the valve seat plate of the conventional valve device, respectively.

※ Explanation of symbols about main part of drawing ※

1: Refrigerant Distribution Device 1a: Valve Device

10: stepping motor 11: first plate component

12: second plate component member 13: valve seat plate

13a, 13b: outlet 13c: inlet

18: rotor shaft (rotational axis) 19: sealed case

28a, 28b: outflow pipe 28c: inflow pipe

DESCRIPTION OF SYMBOLS 30 Valve body 35 Valve body support shaft (rotational center shaft) 111 Small diameter part 112 Ring end 113 Large diameter part 120 Through-hole

In order to solve the above problems, in the present invention, a valve seat plate in which a fluid inlet port and an fluid outlet port penetrate in the thickness direction, a sealing case covering the surface side of the valve seat plate surface side and the inner side surface, and the inlet port and the A valve having an inlet pipe and an outlet pipe fixed to an inner surface side of the valve seat plate so as to communicate with an outlet port, and a valve body for sliding the opening and closing of the outlet port by sliding on an area where the outlet port is formed among the surface side of the valve seat plate; In the device, the valve seat plate is characterized in that it comprises a first plate component constituting the region in which the outlet is formed, and a second plate component member to which the first plate component is joined.

In the present invention, the valve seat plate is divided into a first plate member and a second plate member so as to conform to the characteristics required for each. For example, the second plate constituting member is formed of a press-worked product, and the first plate constituting member is composed of a cut product thicker than the second plate constituting member. For this reason, although the area | region in which the outlet port is formed in the surface of a valve seat plate is a sliding surface of a valve body, since this part uses the 1st plate structural member which consists of a to-be-processed object, it can form with high surface precision. In addition, since the first plate member is a cut product, even when the outlet pipe is fixed by soldering, the first plate member can be formed to a thickness that can withstand the temperature, so that no distortion occurs in the sliding surface of the valve body. Here, the processed product has a high processing cost, but in the present invention, since the processed product is used only as the first plate constituent member, the range for performing the cutting process may be narrow. In addition, the increase in manufacturing cost can be minimized. On the other hand, since the inexpensive press-worked product is used for the second plate constituent member, it cannot be completed with high surface precision. However, since this portion does not become a sliding surface of the valve body, high surface precision is not necessary. That is, according to the present invention, since the thick-cut workpiece is used only at the minimum required portion, the pipe can be attached to the portion where the valve body is slid without causing twist, and the manufacturing cost of the valve seat plate can be reduced.

In the present invention, it is preferable that the first plate member has a size capable of constituting the entire area in which the valve body slides when opening and closing the outlet.

In the present invention, the second plate member is formed with a through hole in which the first plate member is mounted, and the first plate member includes a small diameter portion inserted into the through hole, and the small diameter portion inserted into the through hole. It is preferable to have the annular end part which touches the opening edge of the said through-hole, and the large diameter part located outside the said through-hole when it put in. In such a configuration, when soldered from the side of the large diameter portion, the solder material is wider in the gap between the first plate member and the second plate member, so that high airtightness can be obtained.

In this invention, it is preferable that the said 1st plate structural member is equipped with the said large diameter part in the inner surface side of the said valve seat plate, and the said 1st plate structural member and the said 2nd plate structural member are joined by the soldering in this inner surface side. Do. In this way, the surface precision of the valve seat plate in which the valve body slides can be prevented from deteriorating in surface accuracy due to the solder material.

In the present invention, the thickness dimension of the first plate member is 2.1 mm or more. Preferably it is 2.4 mm or more. After the outlet pipe is inserted into the pipe insertion hole of the first plate member, the stress at the time of press-fitting against the first plate member and the thermal stress at the time of soldering when soldering and attaching the outlet pipe to the first plate member are Even if it is applied, when the thickness dimension of the first plate constituent member is formed to be 2.1 mm or more, the amount of change in the plan view can be suppressed to 1.0 m or less before and after the press fitting and soldering. In addition, when the thickness dimension of the first plate constituting member is formed to be 2.1 mm or more, the amount of change in the plan view can be completely prevented. In addition, the valve body can slide the sliding surface having a high plan view of the first plate constituting member, so that the outlet can be reliably closed.

An example of a refrigerant distribution device for a refrigerator according to the present invention will be described with reference to the drawings.

[Overall structure]

1 is a longitudinal sectional view of a refrigerant distribution device for a refrigerator to which the present invention is applied. (A), (b) and (c) are a plan view, a longitudinal sectional view and a bottom view of the valve seat plate of the valve device used for the refrigerant distribution device shown in FIG. 1, respectively, and FIG. It corresponds to sectional drawing when a valve seat plate is cut | disconnected along the line A-A 'of (c). 3 (a) to 3 (f) are explanatory views of the respective modes in the refrigerant distribution device shown in FIG. 1, respectively.

In FIG. 1, the refrigerant distribution device 1 of the present embodiment has a valve seat plate 13 and a valve device 1a having a closed case 19 covered on the surface side of the valve seat plate 13. have.

In this valve apparatus 1a, the stepping motor 10 as a valve drive apparatus which drives a valve body using the inside and outside of the sealed case 19 is comprised. In the stepping motor 10, the rotor 15 is disposed inside the sealed case 19, while the stator 16 is disposed on the outer circumferential side of the sealed case 19. The lead wire 16b is drawn out from the fixed coil 16a of the stator 16, and the rotor 15 is rotated by outputting a drive signal to the lead wire 16b from a control unit (not shown) equipped with a microcomputer. Control stop.

As for the rotor 15, the magnet 15a is integrally formed in the outer peripheral side, and the pinion 17 is formed in the edge part of the valve seat plate 13 side. This pinion 17 is in a state supported so as to be rotatable about the rotor shaft 18 (center of rotation shaft).

The lower end side of the sealed case 19 is enlarged and constitutes a step on which the stator 16 is placed, and is airtightly fitted with the step 135 formed on the outer periphery of the valve seat plate 13.

1 and 2 (a), (b) and (c), the valve device 1a opens the inlet 13c at the surface side of the valve case plate 13 on the surface side of the sealed case 19 side. Doing. In contrast, the first outlet port 13a and the second outlet port 13b open in the region opposite to the inlet port 13c with respect to the pinion 17 on the surface side of the valve seat plate 13.

In the valve seat plate 13, the inner side of the outlet port 13a, 13b and the inlet port 13c becomes the pipe insertion hole 14a, 14b, 14c. Of these pipe insertion holes 14a, 14b and 14c, the pipe insertion holes 14a and 14b are formed to have a larger diameter than the outlet ports 13a and 13b, and the pipe insertion holes 14a and 14b are stepped. While the pipe insertion hole 14c is a straight hole.

The inlet pipe 28c into which the refrigerant is supplied is inserted and soldered from the inner surface to the pipe insertion hole 14c configured as described above so that the inlet pipe 28c and the inlet port 13c communicate with each other. In addition, the first outlet pipe 28a and the second outlet pipe 28b for supplying the refrigerant into each of the refrigerators in the pipe insertion holes 14a and 14b are inserted and soldered from the inner side thereof, and the first outlet pipe 28a is inserted into the pipe insertion holes 14a and 14b. ) And the second outflow pipe 28b, and the first outlet 13a and the second outlet 13b communicate with each other.

In the valve seat plate 13, shaft holes 13d and 13e are formed as straight holes in the vicinity of the outlet ports 13a and 13b, and the rotor shaft 18 with respect to these shaft holes 13d and 13e. The proximal end side and the proximal end side of the valve body support shaft 35 are respectively fixed by soldering.

The valve seat plate 13 is provided with a shaft hole 13f as a straight hole, and the proximal end of the positioning shaft 191 is fixed to the shaft hole 13f by soldering. In addition, a jig positioning sealing hole 13g is formed in the valve seat plate 13, and a projection 192 is formed on the inner side when the sealing hole 13g is formed by pressing.

In addition, the solder | pewter used at this time ensures the airtight in the axial hole 13d, 13e, 13f.

In FIG. 1, the valve body support shaft 35 is provided with a valve body 30 integral with the gear 36. In this embodiment, the valve body 30 slides the areas in which the first outlet port 13a and the second outlet port 13b are formed on the surface of the valve seat plate 13 so that the first outlet port 13a and the second outlet port ( It is used as a common valve body which opens and closes 13b), respectively.

The gear 36 meshes with the pinion 17 and rotates the circumference of the valve body support shaft 35 by the stepping motor 10. Therefore, the valve body 30 is also rotated by the stepping motor 10.

Furthermore, when the first outlet 13a is closed, the second outlet 13b is closed, and the first outlet 13a is closed, and the second outlet 13b is closed. In the open mode, both the first outlet 13a and the second outlet 13b are in the open state, and the first outlet 13a is in the open state, and the second outlet 13b is in the closed state. When the angular position of the valve body 30 (the area shown by the oblique line in FIG. 3) is controlled when the switch is in the open-close mode, the home position (O step) of the closed-closed position as shown in FIG. The closed-closed mode (34 steps) shown in (b), the closed-opened mode (100 steps) shown in FIG. 3 (c), the open-opened mode (154 steps) shown in FIG. 3 (d), and FIG. The opening-closing mode (195 steps) shown in 3 (e) and the end position (200 steps) of the opening-closing shown in Fig. 3 (f) can be realized in this order.

[Detailed Structure of Valve Seat Plate]

4 is a longitudinal cross-sectional view showing the valve seat plate shown in FIG. 2 in an exploded manner.

In the valve device 1a of this embodiment, as shown in Figs. 1, 2 (a), (b) and 4, the valve seat plate 13 is a disk which constitutes an area in which the outlet ports 13a and 13b are formed. It consists of a first plate member 11 of the shape and a disk-shaped second plate member 12, which is mounted on the first plate member 11, the first plate member 11 is an outlet ( It has a size which can comprise the whole area | region which the valve body 30 slides when opening and closing 13a) and 13b.

In this embodiment, the second plate constituting member 12 is formed of a press-worked product, and the first plate constituting member 11 is a SUS cut that is thicker than the second plate constituting member 12, for example, cutting of 4 mm thickness. It is composed of processed products.

Here, the second plate component member 12 is formed with a through hole 120 on which the first plate component member 11 is mounted.

On the other hand, the first plate constituting member 11 has a small diameter portion 111 inserted into the through hole 120 from the inner side thereof, and a through hole 111 when the small diameter portion 111 is inserted into the through hole 120. The annular end 112 and the large diameter part 113 located outside the through-hole 120 are formed in contact with the edge of the opening.

For this reason, the small diameter portion 111 is press-fitted into the through hole 120 from the inner surface side so that the large diameter portion 113 is located on the inner surface side, and the ring-shaped end portion 112 is temporarily fixed in the state where the opening edge of the through hole 120 is in contact. After soldering the gap between the large diameter portion 113 and the second plate component member 12, the solder material reaches the gap between the first plate component member 11 and the second plate component member 11, thereby obtaining high airtightness. Can be. In addition, since soldering is performed on the inner surface side of the valve seat plate 13, the surface precision of the valve seat plate 13 on which the valve body 30 slides can be prevented from deteriorating due to the solder material.

About the valve seat plate 13 comprised in this way, the inlet pipe 28c is inserted in the pipe insertion hole 14c which communicates with the inlet port 13c from an inner side, and the pipe insertion hole which communicates with the outlet port 13a, 13b ( 14a and 14b are inserted into the outflow pipes 28a and 28b from the inner surface side, and then soldered from the inner surface side to each of the inlet pipes 28c and the outlet pipe (into the inner surface side of the valve seat plate 13). Attach 28a) and 28b.

Here, the valve seat plate 13 is divided into a first plate member 11 and a second plate member 12, and the second plate member 12 is formed of a press-worked product, and the first plate The constituent member 11 is made of a processed product thicker than the second plate constituent member 12. For this reason, the area | region in which the outlet opening 13a, 13b is formed in the surface of the valve seat plate 13 is a sliding surface of the valve body 30, but this part uses the 1st plate structural member 11 which consists of a processed object, Because of this, surface precision is high. In addition, when the first plate constituent member 11 is thick, even when the outflow pipes 28b and 28c are press-fitted and fixed by soldering, distortion occurs in the sliding surface of the valve body 30 due to the stress or thermal stress. There is no.

In this way, in the valve seat plate 13 of the present embodiment, the cutting product has a high processing cost, but the first plate constituting member 11 made of the cutting product is used for the part that needs to consider surface precision and torsion. The quality of the seat plate 13 is high. In addition, since the first plate constituting member 11 made of only the cut parts is used, the region for high precision completion is narrow, and polishing work can be efficiently performed. In addition, the cutting time may be short because the cutting object is used for the first plate constituting member 11 having a small outer diameter. In addition, the increase in manufacturing cost can be minimized.

On the other hand, since the inexpensive press-worked product is used for the 2nd plate structural member 12, it can be completed with high surface precision. In addition, twist may occur due to heat such as soldering. However, since this portion does not become a sliding surface of the valve body 30, the quality of the valve seat plate 13 does not deteriorate even when a low-cost press processed product is used.

As described above, in the present invention, since the thick workpiece is used only at the minimum required portion, the pipe can be attached to the portion where the valve body 30 slides without causing twist, and the manufacturing cost of the valve seat plate 13 is reduced. can do.

[Dimensions of Thickness of First Plate Constituent Member 11]

5 is a plan view of the first plate member 11 before and after the insertion and soldering of the outflow pipes 28a and 28b to the pipe insertion holes 14a and 14b of the first plate member 11. It is a graph showing the change amount of.

The outlet pipes 28a and 28b are press-fitted into the pipe insertion holes 14a and 14b of the first plate member 11, and then soldered to the outlet pipes 28 and 28b to the first plate member 11. ), The amount of change in the plan view of the first plate constituting member 11 before and after press-fitting and soldering the outflow pipes 28a and 28b to the pipe insertion holes 14a and 14b is as shown in FIG. It fluctuates by the thickness dimension of the 1st plate component 1.

In this case, the surface of the first plate member 11, that is, the sliding surface on which the valve body 30 slides, is raised in advance by polishing, so that the outflow pipe 28a with respect to the pipe insertion holes 14a and 14b. It is necessary to set the thickness dimension of the first plate member 11 so that the flatness can be maintained even after pressing and soldering the 28b.

Therefore, in this embodiment, when it is necessary to suppress the planar change amount based on the result shown in FIG. 5 to 1.0 micrometer or less, the thickness dimension of the 1st plate structural member 11 is formed to 2.1 mm or more. When it is necessary to completely prevent the amount of change in plan view, the thickness dimension of the first plate member 11 is set to 2.4 mm or more.

[Other Examples]

In addition, the present invention is characterized in that the valve seat plate is divided into a first plate member and a second plate member, and each member is used for a function. Therefore, for the material of the first plate member and the second plate member, for example, a sintered product or a forged product may be used depending on the type of valve device and valve seat plate to be manufactured.

As described above, in the present invention, the valve seat plate is divided into a first plate member and a second plate member, and the second plate member is composed of a press-worked product, and the first plate member is more than the second plate member. It consists of the structure which suits the characteristic requested | required each, such as comprised with the thick cutting process. For this reason, although the area | region in which the outlet port is formed in the surface of a valve seat plate is a sliding surface of a valve body, since this part uses the 1st plate structural member which consists of a to-be-processed object, it can be formed with high surface precision. In addition, since the first plate constituent member is a cut product, since the outflow pipe can be formed to a thickness that can withstand the temperature when the outlet pipe is fixed by soldering, no distortion occurs in the sliding surface of the valve body. Here, the cutting product has a high processing cost, but since the cutting product is used only for the first plate constituting member, the cutting processing range may be narrow. In addition, the increase in manufacturing cost can be minimized. On the other hand, since the inexpensive press-worked product is used for the 2nd plate structural member which does not become a sliding surface of a valve body, and does not require high surface precision, the manufacturing cost of a valve seat plate can be reduced.

Claims (7)

A valve seat plate through which the inlet and the outlet of the fluid penetrate in the thickness direction, a sealing case covering the surface of the valve seat plate surface side and the inner surface side thereof, and the valve seat plate so as to communicate with the inlet port and the outlet port. In a valve device having an inlet pipe and an outlet pipe fixed to an inner surface side, and a valve body for sliding the opening and closing of the outlet port by sliding over an area where the outlet port is formed among the surface side of the valve seat plate, And the valve seat plate includes a first plate member constituting a region in which the outlet port is formed, and a second plate member to which the first plate member is joined. The method of claim 1, And the second plate member is a press-worked product, and the first plate member is a cut workpiece thicker than the second plate member. The method according to claim 1 or 2, And said first plate constituting member has a size capable of constituting an entirety of the region in which the valve body slides when opening and closing the outlet. The method according to any one of claims 1 to 3, The second plate member is formed with a through hole in which the first plate member is mounted. The first plate constituting member includes a small diameter portion inserted into the through hole, an annular end portion contacting the opening edge of the through hole when the small diameter portion is inserted into the through hole, and a large diameter portion located outside the through hole. Valve device characterized in that. The method of claim 4, wherein The first plate member includes the large diameter portion on the inner side of the valve seat plate, and the first plate member and the second plate member are joined by soldering on the inner side. . The method according to any one of claims 1 to 5, And the thickness dimension of the first plate constituent member is greater than or equal to 2.1 mm. The method according to any one of claims 1 to 5, The thickness dimension of the first plate component is a valve device, characterized in that more than 2.4mm.